IAU: Minor Planet Center
The MPC is responsible for the designation of minor bodies in the solar system: minor planets; comets (in conjunction with CBAT); and natural satellites (also in conjunction with CBAT). The MPC is also responsible for the efficient collection, (compu

International Meteor Organization
The International Meteor Organization (IMO) was founded in 1988 and has more than 250 members now. IMO was created in response to an ever growing need for international cooperation of meteor amateur work. The collection of meteor observations by seve

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AAVSO
The American Association of Variable Star Observers: Professional and Amateur collection, research, and analyses of variable star observations.